Table 2.

Study measures.

Measures		Scale or description
Primary outcomes
	Acceptability	System Usability Scale, Client Satisfaction Questionnaire, and exit interviews
	Feasibility	Retention rate ≥85% at 6-month follow-up, number of responses to SMS text messages, and number of HCa sessions completed
	ARTb adherence	Visual analog scale, 4-week percent of doses taken, and DBSc for HIV viral load (viral suppression defined as <200 copies/mL)
	Substance use	ASSISTd and AUDIT-Ce
Secondary outcomes
	IMBf constructs-information	Knowledge of HIV transmission risk and ART knowledge
	IMB constructs-motivation	Behavioral intentions and attitudes toward risk behaviors
	IMB constructs-behavioral skills	Perceived efficacy as a proxy measure of behavior skills
	STIg	Syphilis, gonorrhea, and chlamydia
	Sexual risk	Timeline followback: sexual behaviors in the past 30 days
Secondary and exploratory—contextual factors
	Mental health	Brief Symptom Inventory
	Social support	Social Provision Scale
	HIV stigma	Shortened version of the Berger Stigma Scale

^aHC: Healthy Choices.

^bART: antiretroviral therapy.

^cDBS: dried blood spot.

^dASSIST: Alcohol, Smoking, and Substance Involvement Screening Test.

^eAUDIT-C: Alcohol Use Disorders Identification Test–Consumption.

^fIMB: information-motivation-behavioral skills.

^gSTI: sexually transmitted infection.